不同农艺措施对双季稻植株地上部镉积累的影响  

Effects of Different Agronomic Measures on Cadmium Accumulation in Overground Part of Double-Cropping Rice

作　　者：祝志娟[1] 傅志强[1] ZHU Zhijuan;FU Zhiqiang(College of Agronomy,Hunan Agricultural University,Changsha 410128,China)

机构地区：[1]湖南农业大学农学院

出　　处：《河南农业科学》2020年第1期31-43,共13页Journal of Henan Agricultural Sciences

基　　金：国家重点研发计划项目(2017YFD0300410);公益性行业(农业)科研专项(201503123-05)

摘　　要：设置施用1000 kg/hm 2生物炭(生物炭1处理)、施用2000 kg/hm 2生物炭(生物炭2处理)、喷施叶面肥、控水4种农艺措施,以常规栽培为对照,研究各农艺措施对双季稻植株地上部镉积累的影响,明确双季稻在各农艺措施下的镉积累规律,以期为湖南省镉污染稻田双季稻降镉农艺措施的选择提供参考。结果表明,与对照相比,4种农艺措施总体上均增加了早稻的穗数、穗粒数,进而提高产量,其中,陆两优996产量达到显著水平,增幅为11.59%~14.36%,但对晚稻产量无显著影响;与对照相比,喷施叶面肥处理显著增加了晚稻丰源优299成熟期茎的镉含量,增幅为15.54%,显著降低了其成熟期叶的镉含量,降幅为53.00%;施用生物炭1、生物炭2处理显著降低了晚稻丰源优299成熟期茎、叶、谷壳、糙米的镉含量及地上部镉积累总量,分别使糙米的镉含量降低了39.76%、26.40%,分别使地上部镉积累总量降低了24.45%、22.83%;与叶面肥处理相比,生物炭1、生物炭2处理显著降低早稻陆两优996成熟期茎、叶、糙米的镉含量,分别使糙米的镉含量降低了37.71%、35.17%;与对照相比,控水处理显著降低晚稻湘晚籼13号和丰源优299成熟期谷壳的镉含量,降幅分别为38.25%和10.37%,但对其他指标无明显影响。综上,施加生物炭能有效降低水稻植株和糙米的镉含量。The effects of four kinds of agronomic measures[applying 1000 kg/ha biochar(biochar 1 treatment),applying 2000 kg/ha biochar(biochar 2 treatment),spraying foliar fertilizer,water control]on cadmium accumulation in aboveground parts of double-cropping rice were studied with conventional cultivation as control,so as to found out the cadmium accumulation law under different agronomic measures and provide reference for the choice of agronomic measures in double-cropping rice paddy polluted by cadmium in Hunan Province.The results showed that four kinds of agronomic measures increased the spike number and grain number per ear of early rice compared with the control,and then increased the yield,among them,the yield of Luliangyou 996 reached a significant level,with the increase rate of 11.59%—14.36%,but each treatment had no significant effect on the yield of late rice compared with control.Compared with the control,the cadmium content of spraying foliar fertilizer treatment in the stem of late rice Fengyuanyou 299 increased by 15.54%,and decreased by 53.00%in the leaves during the mature period.The biochar 1 and biochar 2 treatments significantly reduced the cadmium content in husk,stem,leaf,brown rice and the cadmium accumulation in overground part of late rice Fengyuanyou 299 during the mature period,the cadmium accumulation in brown rice reduced by 39.76%and 24.60%,and the cadmium accumulation in overground part of plant reduced by 24.45%and 22.83%respectively.Compared with spraying foliar fertilizer treatment,the biochar 1 and biochar 2 treatments significantly reduced the content of cadmium in stem,leaf and brown rice of early rice Luliangyou 996 during the mature period,and reduced the content of cadmium in brown rice by 37.71%and 35.17%respectively.Compared with the control,the content of cadmium in rice husk of late rice Xiangwanxian No.13 and Fengyuanyou 299 during the mature period decreased by 38.25%and 10.37%respectively,but there was no obvious effect on other indicators.The above results showed that th

关 键 词：农艺措施 双季稻 产量 植株地上部 糙米 镉含量 

分 类 号：S511[农业科学—作物学]